Okay, let's get this mess cleared up.
I've TIEd my last 5 league games and in the process I've seen all the variations of the "effort message" that exist in the game.
Game 1 - "Both teams played with the same effort"
(2418727)Game 2 - One team played TIE, the other played Normal
(2418710)"King John Warriors tried harder in this game than The Random Dunkers."
Game 3 - One team TIEd, one team CTed
(2418692)"Newcastle Magpies were the only team who tried."
I can further confirm that those three descriptions are the only three effort messages in the Box Score database, since I confirmed them for the UK English database.